The two results are different: the pre-iteration Projection statistics (first column) are the same
but the post-iteration Projection statistics are different. However, since there are the same
number of boxes, the mpi communication should send the same information that is exchanged between boxes
in the non-mpi run. Thus something is amiss in the way information is exchanged between boxes.

Using larger number of boxes and pids (typically 24), we found cases where the non-mpi runs converge but the mpi run do
not converge, i.e. the residual is not reduced below the required minimum of 0.001 .

We have also run the same test case on an Ubuntu system. Here are the results.
1. non-mpi